/* ========================================
   Base Styles - Apple Design Style
   ======================================== */

/* ============ Box Sizing Reset ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* ============ HTML & Body ============ */
html {
  background: var(--theme-bg);
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-10);
}

@media (min-width: 768px) {
  html {
    scroll-padding-top: var(--space-11);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0 auto;
  padding: 0;
  font-family: var(--font-primary);
  font-size: var(--text-body);
  font-weight: var(--font-medium);
  line-height: var(--leading-normal);
  color: var(--theme-text-primary);
  background: var(--theme-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  max-width: 1920px;
  overflow-x: hidden;
  overscroll-behavior-y: none;
  -webkit-overflow-scrolling: touch;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============ Typography ============ */

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

/* Headings — 3 roles only (display / heading / body), responsive via clamp() */
h1 {
  font-size: var(--text-display);
  font-weight: var(--font-black);
  letter-spacing: -0.03em;
}

h2,
h3 {
  font-size: var(--text-heading);
  font-weight: var(--font-black);
  letter-spacing: -0.025em;
}

h4,
h5,
h6 {
  font-size: var(--text-body);
  font-weight: var(--font-bold);
}

/* Paragraphs */
p {
  margin-bottom: var(--space-5);
  color: var(--color-text-primary);
}

p:last-child {
  margin-bottom: 0;
}

small {
  font-size: var(--text-micro);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.125rem 0.375rem;
  background-color: var(--color-light-dark);
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  padding: var(--space-4);
  background-color: var(--color-dark);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

pre code {
  padding: 0;
  background-color: transparent;
  color: inherit;
}

/* Lists */
ul,
ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

li {
  margin-bottom: var(--space-2);
}

/* Horizontal rule */
hr {
  border: 0;
  border-top: var(--border-width) solid var(--color-border);
  margin: var(--space-8) 0;
}

/* Selection */
::selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}

::-moz-selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Images */
img {
  display: block;
  max-width: 100%;
  height: auto;
}